These 8 task cards are great for use in centers, for individual or paired activities. The Dewey Decimal Bookmarks or Graphic Organizer will that are in my store, will also pair well with these task cards. Students must use their knowledge of the Dewey Decimal System to complete the activities. Two of the cards will require students to locate books on the shelf. Time needed to complete will vary according to how many students do in one sitting. Task Cards #1 - #4 will not require but a few minutes each, while task cards #5 - #8 could require up to 15 minutes each.